Can the full features of Blender be used with a trackpad?
On modern Mac OS X, it seems you can:


Two-finger vertical scroll to rotate along horizontal axis perpendicular to view
Two-finger "spin" to rotate around up axis
or Two-finger horizontal scroll to rotate around up axis
Two-finger pinch to zoom
or CTRL + two-finger vertical/horizontal scroll to zoom
SHIFT + two-finger vertical scroll to pan along up axis
SHIFT + two-finger vertical scroll to pan along horizontal axis perpendicular to view
RIGHT click and drag to translate selected object
CTRL click and drag to lasso select